package handler

import (
	"github.com/gin-gonic/gin"
	"net/http"
)

var (
	g = gin.Default()
)

// HandlerFunc ...
func HandlerFunc(w http.ResponseWriter, r *http.Request) error {
	g.ServeHTTP(w, r)
	return nil
}

// GetGinEngine ...
func GetGinEngine() *gin.Engine {
	return g
}

// Cors 允许跨域
func Cors() gin.HandlerFunc {
	return func(c *gin.Context) {
		method := c.Request.Method

		c.Header("Access-Control-Allow-Origin", "*")
		c.Header("Access-Control-Allow-Headers", "Content-Type,X-Requested-With,AccessToken,X-CSRF-Token,"+
			" Authorization, Token")
		c.Header("Access-Control-Allow-Methods", "POST, GET,DELETE,PUT, OPTIONS")
		c.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin,"+
			"X-Requested-With, Access-Control-Allow-Headers, Content-Type")
		c.Header("Access-Control-Allow-Credentials", "true")

		//放行所有OPTIONS方法
		if method == "OPTIONS" {
			c.AbortWithStatus(204)
		}
		// 处理请求
		c.Next()
	}
}
